11. A depression in the ground due to a cave collapse or acidic water dissolution of limestone is called a

Physics

1 answer:

Ierofanga [76]2 years ago

4 0

It is a sinkhole so yeah.. letter A

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For what position of the object will a spherical concave mirror project on the screen an image smaller than the object? a. betwe

luda_lava [24]

Answer:

option (d)

Explanation:

A concave mirror always forms a real and inverted image of an object except when the object placed between pole and focus of the mirror.

When the object is placed beyond the centre of curvature, it forms a image which is smaller than the object but it is real and inverted in nature.

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2 years ago

A 10-turn ideal solenoid has an inductance of 4. 0 mh. to generate an emf of 2. 0 v the current should change at a rate of:_____

Lady bird [3.3K]

The answer is 500 A/sec.

N=10 ; Solensid; L=4 m H ; $\varepsilon=2 \mathrm{~V};$

$\begin{aligned}&\varepsilon=-L \frac{d I}{d t}=N \phi ; \\&2 \times \frac{1}{L}=-\frac{d I}{d t} ; \\&2 \times \frac{1}{4 \times 10^{-3}}=-\frac{d I}{d t} ;\end{aligned}$

$0.5 \times 10^{3}=\frac{d I}{dt}$

So, 500 A/sec.

What is Solensid?

Electromagnets are magnets in which the wire is coiled around an iron core. When an electric current is applied to the iron core, a magnetic field is formed around it. When the power is turned off, the magnetic field dissipates. The wire-wound core of the magnet is ferromagnetic or ferrimagnetic in nature. The most prevalent material utilised in the core is iron.
The magnetic field created is governed by the availability of power. A permanent magnet does not require electricity, and its magnetic field cannot be changed. Solenoid, MRI machines, hard drives, relays, motors, loudspeakers, and generators all employ electromagnets.

To learn more about Solensid visit:

brainly.com/question/15061394

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1 year ago

A road that rises 1 ft for every 100 ft traveled

Lana71 [14]

Explanation:

6% grade

=> Rises 6 feet for every 100 feet traveled

This would mean that tanx = 6/100.

=> x = tan^-1(6/100) = 3.4°. (1d.p.)